Open House: The Great Sex Experiment

New couples move into the Open House. Chloe and Mark, who've only ever had sex with each other, open their relationship up to see if Chloe's attracted to women.

Can Jonny and Sarah overcome their nerves? And will Tanith and Paul partake?

Jonny and Sarah have fallen for French lingerie model Marie...

Could an orgy be the best way for Jonny and Sarah to finally open up their relationship?

Will Tom's stage fright stop him rising to the occasion? And Alex's confidence is rattled.

Chris and Simon want to explore whether Simon is bisexual, before they tie the knot.

Will a social ease Sharmayne and Jamie in? Plus: hot tubs for Simon, hesitation for Chris.

Can swingers Ashley and Tanya take the next step and have sex with others, on their own?